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This paper presents a blind channel estimation algorithm based on the minimization of a new criterion. The algorithm is typically devoted to the case of an OFDMA context with K-ary QAM modulation and a weak number of received symbols, potentially inferior to the constellation size. In the simple 4-QAM case we analytically show that this algorithm is equivalent to the classical Viterbi-Viterbi algorithm...
The future wireless communication is expected to be able to improve the efficiency of spectrum usage. To solve the challenge of spectrum shortage, an innovative opportunistic spectrum access strategy, called cognitive radio (CR) has been proposed. Conventional orthogonal frequency division multiplexing (OFDM) has already been suggested as a physical layer candidate for CR system. Herein another potential...
The purpose of this paper is to analyze orthogonal frequency division multiplexing carrying offset QAM (OFDM/OQAM) signal detection using cyclostationary signatures, which are artificially embedded into digital modulated signals. The spectral correlation characterization of OFDM/OQAM signal can be described by a special linear periodic time-variant (LPTV) system. Using this description we have derived...
This paper addresses the problem of the fine frequency synchronisation for the case of a radio-mobile transmission using a short radio burst with P-ary QAM symbols. In such a case the preamble, required by the frequency synchronisation algorithm, must be as short as possible and it could eventually be avoided. A new blind frequency synchronisation algorithm is then proposed in this paper
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